Comment 3 for bug 1317551

Please not that libquazip is build using Qt4 as ldd shows

eric@ubuntu:~$ ldd /usr/lib/x86_64-linux-gnu/libquazip.so.0
 linux-vdso.so.1 => (0x00007fffb49f9000)
 libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007feef5ae6000)
 libQtCore.so.4 => /usr/lib/x86_64-linux-gnu/libQtCore.so.4 (0x00007feef5601000)
 libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007feef52fc000)
 libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007feef50e6000)
 libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007feef4d20000)
 libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007feef4b01000)
 libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007feef48fd000)
 libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007feef45f5000)
 librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007feef43ec000)
 libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007feef40e6000)
 /lib64/ld-linux-x86-64.so.2 (0x00007feef5f4b000)
 libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007feef3ea7000)

and that you used Qt5.2.1 to build your tests. When you build source+tests with Qt5 all goes fine.

May be this is the source of the problem.